Dual core development board

Function module introduction 1: Five-wire four-phase stepper motor drive module, using ULN2003 chip, can drive DC motors, five-wire four-phase stepper motors, etc.; 2: Four-wire bipolar stepper motor/DC motor drive module, using TC1508S chip can drive DC motors (forward and reverse control), four-wire bipolar input motors, etc.; 3:16 1 6LED dot matrix module, which can independently control two-color dot matrix to display numbers, characters, Chinese characters, graphics, etc., can be designed LED advertising screen; 4: Dynamic digital tube module, using 74HC245 chip to drive 2 four-in-one common cathode digital tubes; 5:7 4HC138 decoder module, using 74HC138 decoder, used by default to control dynamic digital tube bit selection; 6: 74HC595 module, using 4 pieces of 74HC595 chips to be cascaded and expanded 10, can be used to control 16 16 LED dot matrix, digital tube, etc.; 7: DS1302 clock module, using DS1302 clock chip, can realize the digital clock function; 8: RS232 module, using MAX232 chip can realize RS232 serial 0 communication and program download, and is compatible with DS18B20 temperature sensor; 9: USB to TTL serial port module, using CH340 chip, can realize USB to TTL serial port function, which can not only download programs but also realize serial communication; 10: Infrared receiving module, using an integrated infrared receiving head, can realize infrared remote control communication; 11: Bluetooth module interface, using PZ-HC05 Bluetooth module, and working with APP to realize Bluetooth wireless control; 12: Matrix keyboard module, can realize keyboard input Control; 13: Independent button module, using 2*4 buttons, can realize button control; 14: System power switching terminal, 3.3V and 5V power switching, use 51 microcontroller to switch to 5V, the default is short to the 5V terminal , can be switched to the 3.3V terminal when using STM32; 15: ADC module, using the XPT2046 chip, can realize analog signal acquisition and conversion, and can design a simple voltmeter, etc.; 16: DAC (PWM) module, using the LM358 chip, can realize analog signals Output, PWM control;